import { HttpClient } from '@angular/common/http';
import { Pipe, PipeTransform } from '@angular/core';

@Pipe({
  name: 'fetch',
  pure: false
})
export class FetchJsonPipe implements PipeTransform {
  private cachedData: any = null;
  private cachedUrl = '';

  constructor(private http: HttpClient) { }

  transform(url: string): any {
    if (url !== this.cachedUrl) {
      this.cachedData = null;
      this.cachedUrl = url;
      this.http.get(url).subscribe(result => this.cachedData = result);
    }

    return this.cachedData;
  }
}

import { Pipe, PipeTransform } from '@angular/core';
/*
 * Raise the value exponentially
 * Takes an exponent argument that defaults to 1.
 * Usage:
 *   value | exponentialStrength:exponent
 * Example:
 *   {{ 2 | exponentialStrength:10 }}
 *   formats to: 1024
*/
@Pipe({name: 'exponentialStrength'})
export class ExponentialStrengthPipe implements PipeTransform {
  transform(value: number, exponent = 1): number {
    return Math.pow(value, exponent);
  }
}

import { enableProdMode } from '@angular/core';
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { singleSpaAngularElements } from 'single-spa-angular/elements';

import { AppModule } from './app/app.module';
import { environment } from './environments/environment';

if (environment.production) {
  enableProdMode();
}

const lifecycles = singleSpaAngularElements({
  template: '<app-custom-element />',
  // We can actually not rely on the `zone.js` library, our custom element
  // will behave itself as a zone-less application.
  bootstrapFunction: () =>
    platformBrowserDynamic().bootstrapModule(AppModule, { ngZone: 'noop' }),
});

export const bootstrap = lifecycles.bootstrap;
export const mount = lifecycles.mount;
export const unmount = lifecycles.unmount;

import { Injectable } from '@angular/core';
import { HttpClient } from '@angular/common/http';

@Injectable()
export class ConfigService {
  constructor(private http: HttpClient) { }
}

import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';

@NgModule({
  imports: [
    CommonModule
  ],
  declarations: []
})
export class AppRoutingModule { }